16. What is the overall reaction in a galvanic cell?
a) Oxidation at the anode, reduction at the cathode
b) Reduction at the anode, oxidation at the cathode
c) Oxidation at both the anode and cathode
d) Reduction at both the anode and cathode
17. What is the overall reaction in an electrolytic cell?
a) Oxidation at the anode, reduction at the cathode
b) Reduction at the anode, oxidation at the cathode
c) Oxidation at both the anode and cathode
d) Reduction at both the anode and cathode
18. Which of the following is a characteristic of a primary cell?
a) It can be recharged
b) It is non-rechargeable
c) It has a negative cell potential
d) It operates at very low temperatures
19. Which of the following is a characteristic of a secondary cell?
a) It can be recharged
b) It is non-rechargeable
c) It has a positive cell potential
d) It operates at very low temperatures
20. What is the purpose of a porous barrier in an electrochemical cell?
a) To complete the circuit
b) To prevent mixing of electrolytes
c) To increase the voltage
d) To control the flow of electrons
